* {
    box-sizing: border-box;
}

html, body, #app, .container{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.bd {
    border: 1px solid red;
}

.my-container {
    padding: 0;
    margin: 0;
}